Bearing



July 3, 1928..

F. W. FRl-TCHEY BEARING 3 Sheets-Sheet 1 Filed April 16, 1927 I N VEN TOR.

4TTORNEYJ Patented .lulj r 3, 1 928. I

FRANK IN! rnrrcrmY, ior CUMBERLAND, MARYLAND. 1 F1 1 q a ma.

; n mati n fi a A ri1;ie, 1927. serial No. sm-0.71

' This invention relates .to adjustable or take up: bearing, particularly applicable, to

locomotive driving boxes. Y

One object of the invention is to provide a bearing for: locomotives and other-Tina chines which canbeiadjus'ted' and kept-to a neat fitto the journal, thereby eliminating the present prevailing severe shocks and P und -r 1 Another object is weaves-e meaiishr complete renewal of these bearings, like wisefthe renewalof the'e'ndbearings or' l'ats eral faces for the purposecofftakingupl ex cessive end play." i Another object is to provide means Whereby all such renewals and adjustments can be made without dropping wheels, or in other 1 words without removing thedriving wheels from the frames of a locomotive or similar machine. r

' The present general practiceinmaking a locomotive driv ngbox 1s as follows:

i I Practically all driving boxes are made of cast ironvor. cast steel; mostly fcast steell forced or pressed what is termed a qu'arter moon or crescent shaped crownbrass f0r bearing. This bearing encircles' juist about one half the circumference. offthefjournal. These brass bearings are forced into the boxes with hydraulic pressures'var'ying from to tons. As a result of thisprocessthe box is" spread at the bottom or 'open end varying from awn inch. After the brasses are forced in; the boxes are machined and the shoe and wedge faces-are made parallel. v V

After the driving applied and the locomotiveplaced in service, and during the initial trial tripsfjwhenj the bearings are being broken in, these boxes all'heat 'to'more or less extent as a result of; which they tend] to relieve themselves from i 45 the strain of havingthe crown brass forced into them. n consequence each-box closes in on the brass'and the brass in the heat ed 7 state being more pliable is, forced or pinched These are machinedfinf the usual manner, andwithin them in theupperpartfthereis boxes are 'co'm a 2 2 of Fig,

away in orderfto'freeitself, resulting i {an 5 enlarged and; pounding bearing. Also through this. samefprocess" the box has. distorted itself to'suchanfextent that thershoe and wedge faces I are out of" parallel? the amount the box has closed at thej oacm or open eiid;. This also further causesa ound g, C0I 1d1t1on of these bearings due to the box faces being tapering} Within parallel shoe d w dgdfacesij The'usual' present rem? edy fe thi condition isjt'ofremovethe'wheels and put the boxes partS through the prev ous process of" renewal "with ja'ssu'r ances of thesame programmenot repeating itself. Therefore',the presentlpractice' is ,not only'very costly, butc also there'can .beiio assurance of permanency as against ,knocks and pounds'toeven ,ajsmall degree. The most detrimental feature from this pounding condition is the damage'ito main frames and other parts as a-v result of the severe shocks from such pounding; Y

fAlso under present practice r lateral or "hub face'endof'thebearing has i i become worn to the condemning]'limitlas prescribed bythe rulesfof 'the'fl;10 C. laws;

to make thenecessary repairs; I

quiresthe removal of' t h'e wheels-fandb'oxes eliminated by my improvement." J

In the accompanyi g dr -1 certain-re:

wayvofexample .7 .1, Fig.1 s a front vlew of a box and'bearin'g: V I in accordance w thmy invent on, parts belng broken away;

"Fig.2 is a Fig.5?) is a horizontal seamentime ,gggcofmgyli "Figs. '4, '5 and 6 views usedin the device 1Sl'ldwl1fl1 1 Elg. 1,: I I Q Fig, 7. is a frontlviewfof a modified form" with parts broken away, and f i I bodiments 'ofiny invention are shown".

vertical s ection -onf the line: if i 90.

Fig.3 is a side 'vlewfpartly" siectiori of the device shown in Fig. 7

Ordinarily my improvement "can" i 1 1 plied or adapted to; presenter prevailing 10o designs of locomotivedrivin'g 'boxes ,The' drawing shows a dr ving box used injordlf a circular supporting surface for the hear ing parts which will now be described. It will be observed that instead" of using theold crescent shaped crown brass for the hearing that a complete bushing shaped piece of brass is used, this completely encircling the axle. This bushing-has a flanged section 11 at the outer end which provides the face for hub or lateral end play wear. 7 This flanged bushing, is separated into sections, ordinarily. four of such sections beingvprovided, this for the purpose of ready removalwithout the removal of the wheels and' other parts, as Well as for the purpose of being able to cut down or narrow the sections, when so removed, to take up for wear. In other words, when they have become worn from journal wear they can be closed to form a closer or proper fit to the journal, Further, when such process has proceededto-the maximum, these sections can then be renewed, this also without the removal of wheels and other parts. Also', this provision for the renewal of the sections provides a means of remedying" end play wear when such has progressed to the condemning limit, this 'also wlthou't the removal of wheels.

"The diameter of the outer periphery of the bushing 10'is smaller than the diameter of the circularbearing surface 5, and within the spacebetween the two there is arranged -a steel crescent or eccentric shaped bushing 12, this being in two sections, separated at the top andbottom. The thin section of each half is; at thetop and the heavy, orthicker section at the bottom. 7 These steel bushings called hereinafter the two circular wedges, have the particularfunction-of holding the brass bushing sections in place in a substantial and secure manner. A sufficient opening is provided at top and bottom. be-

tween the ends of the circular wedges to" allow for their movement either; way, to close in tightly upon the brass bus-hing or to open for easy removal of the-parts. Means are provided for moving, the circular wedges up and down in circular fashion. This may a take the form, as shown in the drawing, of a a segment of gear teeth 14! machined into the outer face, of thelower' or thick part of the wedges, and spindle pinions 1 5 meshing into these gear teeth These spindle pinions are revolubly mounted in boredrecesses 16 in the filler block 2 and have a portion or section of their teeth projecting. outside of the bored recesses to provide engagement with set, the spindle pinions are locked in position by means of akey 18 inserted in a slot 19 which'coincides with one of the spaces between the teeth of the pinion. A- locking wedge 6 of proper width may then be inserte'd between the lower ends of the circular wedges. U a

The filler block 2 is a'steel piece which occupies the space where at present the oil orgrease cellar is ordinarily located. With this proposedimprovement, the oil or grease cell'ar is abolished for the reason'thatsince the bushingbearing completely encircles the axle,.'a cella'rflw'ould be useless, and therefore other means of lubrication are provided. This can consist of means for.

forcing oil or grease into the bearing under pressure. H 7

To supplement the tying in of the sides of the box by the tiller block binding plates 20 and 21 are provided which have offset portions 22 and 23 respectively adapted to engage with a draw fit over the shoulders Qdand 25 of the box. The binding plates are held in place by tie bolts 55 extending through the binding. plates and through holes 26 in the filler block. i

The above described type of hearing has numerous advantages, among which may be mentioned the followingz It provides means for taking up wear without removing the Wheels or boxes from the main" frame;

The bearing: bushing can beshifte'din the box so thatth'egreatest possible wear of the entire area: of the hearing before renewal is obtained, thiswithout the removal of wheels or boxes fromthe frame. I

The bearing can be renewed-after maximum'wear' both circumferentia'lly and laterally without removal of wheels or boxes from the frames. V

The bearing can be kept to a close fit to the journal, thereby eliminating the de-j structive shocksyand pounds transmitted to the other structural parts of the machine as prevails with present practice.

With this bearing the running is smoother and the machine can be] more economically maintained because the bearing completely encircles the aXl'e, providing a greater area of bearing where most needed, that is, fore and aft, to take the end thrusts of the piston and main rods. Furthermore the hearing completely encircling the journal prof Means are providedfor rem'edying'l'ateral" vide'sabetter means of retaining the lubrication entirely around the journal.

'or'end wear by either renewal -of bearing sections or by reclaiming the same by building up, by Welding, theworn hub faces,.all TI without the removal of the wheels.

The driving box is of substantial construction capable of absorbing strains thrust up on the same, thereby lessening liability of I breakage.

The driving box is constructed and held together in such a manner that the shoe and Wedge faces remain parallel, thus eliminat ing another of the causes of knocks and pounds such as'prevailwhen these faces are not parallel.

the flange 34 of the steel bushing is secured,

' the shoulders 42.

In Figs. '1 and8 I have shown 'a modified form of my improvement in which a floating bushing is used.

r A sectional steel bushing 30 is provided with shoulders 31, 32 within which is held a sectional brass floating'bushing, 33. Upon preferably by spot welding, a brass or bronze end thrust plate 35.

The, circular wedges 12 and adjusting pinions 15 are also used in this modification. I A different form of filler block and ,fas tening means. therefor is shown in Figs. 7 and 8. In this case the filler block 36 is supported by eye-bolts 37 pivoted in slots ing wedge 6 and the keys 18 in position.

' It will'be understood that it maybe possible or necessary to employ other detail methods to secure the filler block in driving boxes of special extraordinary design, however, the two methods shown shouldsuflice in general practice or ordinary designs.

In this arrangement of floating type of bearing it will be understood that thefeature of take up and closing for wear of'the sectionalbrass bushing does not prevail, however, when these floating sections become worn to the extent of requiring renewal they can be readily and easilyreplace'd. The main advantage and the one'which is of great consequence is the fact that by reason of the sections of bushing 33 floating or revolving within the steel bushing 30, greater area of bearing is acquired, in fact, this area is in creased two-fold, and 1n consequence wear 1s reduced proportionately; likewise liabilities :of failures from overheat are reduced and practically eliminated. 7

the frames. 1"

Having described" inventiornI claim:

As regards renewals' and replacements of worn parts the same-features and advantages will prevail in the matter" of making these renewals without droppingthe wheels from 1. In a; locomotive driving box, a box'con sisting of a substantially U-shaped body and a detachable filler block bridging the ends thereof, the inner faces of saidbody and filler block presenting a circular supporting surface, a sectional annular bushing within said supporting surface of-smaller outer diameter than the same, and circular wedges between said supporting surface and said bushing.

2. A device in accordance with claim 1 in,

which said body portion and filler blockare. secured together by interlocking tonguesand v grooves for preventing spreading of the sides of the'body portion. 1 r

3. A device in acco dance with claim combination with a binding platev adapted to.

bridge the ends of said substantially U- shapedbody'member, shoulders on the ends of said body. member, offset portions of-said binding plate adapted to engage said shoul-. ders, and means for holding said binding plate in' position.

4, In a locomotivedriving box, a box consisting of asubsta-ntially- U-sha'ped body and a detachable fillerblock-bridging the ends, 7

thereof, the inner faces of said body and.

filler-block presenting a circular supporting 1 surface, a sectional annular. bushing within said supporting surface ofsmaller diameter than the same, a 'flange'on one end of said bushing adapted to take lateral thrust against I the bearing, and circular wedges between said supporting surface and said bushing. 5. In a locomotive driving box, a box cone sisting of a substantially U-shaped body and a detachable filler block bridgingthe ends thereof, the inner faces of said body and filler block presenting a circular supporting surface, a sectional annularv bushing of hard metal within said supporting surface, and of smaller outer diameter than the same, a float-' ing bushing of softer bearing metal within said first mentioned bushing, and circular Wedges between said supporting surface and said first mentioned bushing; I

ing box having an inner circular supporting surface, anxannular bushing ofhard metal within said supporting surface and of smaller bushingof softer bearing metal within said 6. In a device of the class described, a bearouter diameter thanthe' same, a floating first mentionedbushing, a flange on one end I of said first mentioned bushing, an annulus of softer bearing metal secured to said flange, and I circular wedges between said supportingsurfacenand' said first mentioned j bushing.

j 7; In a locomotive driving box, a boxhaving an inner circular. supporting surface a f orma closed cylinder. around the journal of sectional annular bushing Within said cir the driving WheeL- I I cular supporting surface and of smaller out- The foregping specification signedatflum- 1 side diameter than the same and circular berla-nd, Maryland t-his 16th day of March,

: Wedges between said supporting surface and 1927.

said bushing, the sections of. said bushing V i u being of such circumferential" length as to FRANKLIN W. FRITCHEY. 

